Electrical circuit-changing mechanism.



l A-. L'.- SOHM. ELECTRICAL CIRCUIT CHANGING II/IECHANISVM.

' APPLICATION H LEQ API?. I51-I9I2.

Pat-ted May 1L 1915.

kit

. the fran1e-piecc 1.10.

as best illustrated in Fig. 1.

vice, part of the view being a section taken on the plane of the line 11i-el et Fig. 2 and looking in the direction indicated hy the arrows; Fig. is a .front tace view or' one set of contacts; Fig. 6 is a rear face vie-w ot one t the wipers; 7 is a sectional 'View taken on theplane of the'line 7-7 of Fig. 2 and looking in the direction indicated'hy the arrows; 8 isa partial View taken on the'plane of the line EMI-8 of Fig. 2 and looking in the direction indicated by the arrows; and Fig. 9. is a diagrammatic view illustrat ing the manner in which my device may be connected up in circuit.

Like reference characters are applied to the same parts throughout the various iigures. f

The various operating parts of my device are conveniently)T carried together and upon the frame-piece 10, of U-shaped crosssection, which may he secured 1n place in -a suitable case in any suitable manner. This rarne-piece 10 as clearly illustrated in Figs, l2 and 77 receives en insulating block 11 which may be secured in place hy means of screws 12, 12. On the hack of the framel piece 10 three bosses 13, .13 are provided and these bosses provide suitable hearings for the shafts 14, 15 and 16. ln. the particular device herein disclosed, l shall refer to the shaft 14 as the fraction shaft, to the shalt 15 as the units shaft, and to the shaft 16 as Ithe tens shaft. vEach of the shafts 1&1-, 15 land 16 carries at its forward end a wiper 17 insulated by means of 'the insulating spool 18 and held in place hy a clamping screw 1.9. Incidentally, a -l'iurnher .dislc 2'() is also (damped in place with the wiper hy means of the clamping,Y screw 1.9, is also a thumb-screw 21. rlhe wiper 17 is provided with a part 17n cut from the center thereof and sprungI inwardly as clearly illustrated in Fig'. 7. The main part of the wiper is adapted to always ride in contact with a ringl .22 disposed in the block 11 con centricallyY with the shalt 1.5. The part 17 oit lthe wiper is adapted to ride over.' and engage a series t circularly' arranged contact pins 23 which are screwed in from the back of the block 11 and passed through enlargedopenings 24, 2li in the heck of 1t will he seen that by screwing in these pins inore or less, the proper adjustment may he secured in order that the wiper part may make the proper engagements. A. cover 25 covens,A the parte which have just'heen described, there heine' openings therethrough for the passage of the thumb-screws 211 and' also properly disu posed openings l26, 26 for the exposure ci onekof the numbers on the nuinher dish' 2O The trarne piece l() is secured to a ypair of rearwardly extending posts 27, 2 which Ecrin hearings for the longitudinally extending; shaft 28 messes held against displacement hy means of a set collar 29. rllhis shaft is periodically advanced by means oli-time controlled spring4v mechanism 30, of any desirable kind. Mechanism is provided for lrineniatically connecting the shafts Ll, 15 and 1,6,l with ,the shaft 28 so that the motion of' the motor 30 may be transmitted thereto. and 15 are connected with the Shaft 14 through the medium of Geneva mechanism,

as will be described presently, and the shaft 14 iff. adapted to he connected with the shaft 28 .through the medium of an electromagnetically operated clutch which isl-constructed as follows: The post 27 carries a.

The shafts 16 contact in `the forward end of said core,

tends normally to throw the armature 36 out to the position shown in dotted lines in Fig. Ll. Upon the top' of the frame 32 a lever arm 39 is pivoted at 40 and the'forward end of this arm is provided with a hook Ll1 which, when the armature 36 is drawn up, is held in engaging position hold-- ing lie armature/hy means o'l a spring 4:2 dlwcsed between the tail of the lever arm and the frame. A second core 43 is -mountod on the frame 32 and this core carries an energizing winding 14. The core Il" provided with an armature 45 which is secured to the tail ot' the lever arm 31') andl when the winding; is energized, the armature will. he brought down'to raise the hoolc 41 and to allow the spring 38 to throwback the armature 3G.

The shalt lll, as illustrated in. Fig. L1., lies in the plane of the shaft 28 and is extended almost to that shalt. (ln this extension. the

geur wheel 4G is s'plined so as to rotate therewith, and a collar 4.7 is loosely mounted upon the shaft 14 beyond the ggear wheel and. is prvwided with a yoke 48 which strade dles'the shaft 2S and which engages in a pocket 4:9 in the face oit the armature 36. A tooth disk 50 is also secured upon the shaft 14. anda spring '51 disposed between the tooth dish and the gear tends to torce the gear' rearwardly and to hold the yoke 48 in constant engagement in the pocket 49 in tliearinature. The tension of the spring^ 51, however, is designed to oe overcome by the tension. of the spring 38, so that when the armature 35 is released it will he free to nieve forwardly. 'W'lien the winding is ei'ierggized and the armature 3G isv drawn'up, the spring 51 is free to act and to more the gear wheel. #i6 into engagement with the pinllt ` carries the fractions in eighths.

.shaft 938. it will thus he seen that when the Winding" 35 is cnerlqizecl. the gear and the tatles with the gear ll-f anti thus the connection between the Wiper and the driving means is controlled eleetromagnetically.

rthe tooth riisitt) is in mesh with the cam riisir 53 secured upon. the shaft 15, the'tooth a on the dish: O'heing adapted to coiperate with the slots 53 in the periphery of the cam dish 53 so that for ei'ery ten revolutions of the shaft lit there will be. one revolution ot the shaft l5. The shaft l5 is also provided with a tooth iislc 541th@ tooth 5l ot" which is adapted to eoiiperatewiththe slots 55EL in the periphery of the 'cani disk 55 seein-ed upon the shaft 16, the arrangement being such that the shaft 16 will make one revolution for every ten revolutions of the shaft 15. lt will he seen. that vthe disks 20 on the shafts l5 azul iii carry the digits from l to 0. While the disk 20 on the shaft 14 This is hecanse of the particular showing that I am making herein, sinoe, as l have said, .l. coin template the use of my invention partienlarlyin connection with a time keeping organizatioifi. Thus, let it be presumed that the shaft will he actuated by the device 3G to malte a half revolution every seven and a halt' miimtes. Also let it be presumed. that such a hait' revolution-will cause oneeighth of a revolution ot' the gear 4S. Thus," the wiper on the sha it lei is advanced one-eighth ot a revolutionl every seven and one-half minutes. There a re eight equally spaced contacte in assfieiation with. the fraction shaft and thus the fraction Wiper is moved 'from one contact to anotier, step hy step,

when the gear is in contact with the pin-- .connotation with this shaft moves troni one to the next ta each complete revolution of the shait 143-. rQiiiere are ten eontaets 23 in association with the sha tt l?) andthe wiper on this shaft moves from one to .the next for each complete revolution ot' the shaftxl.

ln order that it may appear from the face of the haak et devices whether or not a particular device is in operative relation with the iirii'ingr shaft 2S. i provide an iu- (heating piece :3G which. hymeans of a rod EL is carried hy the armature 3V). The indicatie' 5G is disposed in the rear of a win- (low in the cover and it appears (lirectly behind such window, exposed to View, when the armature 36 is thrown out in the dotted position shown in Fig. 4. lVhen the armature 36 is drawn up, the indicator. is hidden, illust 1ated. and one may know from the fronto the boar that the geare are in mesh.

In order that the Wipers may set inciependently of each other, il proritle a special arrangement for the shaft l5 as illustrated inv Fiq. T. The shaft l5 'is capable 0.?, longi tiulinal movement in the hearingr i3, hat under normal eozulitions this longitudinal movement is overcome hy a spring 59 huigigecl in a pocket (i0 in the block ll around the shaft 15. This spring tengis to hohl the disk 53 up against the hearing 13 and when so disposed thefaces'ot the (teneva `nieehanisrn are all in operative relation, as illustrated in Fig. When, however, it is desired to set the wipers indcponih-ntly oi'caeh other, the` thumb-screw l is pushed inwardli7 and this removes the disks land 533 from engage ment with the links 55 and 50 respectively, as illustrated in' dotted lines in Fig. 2.

Referring now to Fig. 9.1 have there ilustratecl diagrammatically a system in which the cleiyice et my invention is employed. The Contact parts oi. thefieviees are illus trated `at 0, o, e, and the eleotioinagnetie parts are illustrated at e, e? e. lt is new understood that each of the. eleetiomagnetie devices e has'two magnets, one of which throws the Contact mechanism into operativi-i relation with the shaft @841ml the other of which removes it. l provide switch plate S upon which 'a plurality et' switches s, e, are mounted. The movabie elements oi" these switches are ali connected to one pole of the battery anii the other poieof this battery is connected to one terniiuaiot each.

Theother of the.electronulguets 3l and 85. terminal of the magnet 35 is connected with the in Contact i' et one of the switches anni the other terminal of the Winding 3i is con` neoted with the out Contact of the ewitciu There is a. switch a for each (ieri/e a. l Each .of the contacts 23 is oonneeteoi with the printing eleetromagnet anti .if it is ilesireil to print a certain number when the wiper ia in engagement with a, certain Contact, the printing electromagnet ot tliat'same (tenermi-- nation 1s connecte-ci, with that Contact, one

terminal being connected with the Contact..

and the other with the wiper. have shown such a printing electromagnet at y; :nul have shown abattery in this circuit. A switch e is assigned. to each employee and when he begins work he closes the in circuit and; that throws the particular accumulator 'in that Circuit into operative relation with the driving mechanism. When he stops wort: he closes the out circuit ami this removes his accumulator 'from the driving morini nism. As this goes on, the contact mecha nisin is gradually advanced step hy step aiu! when it is desired to obtain a record of the time spent hy any particular employee. the printing electron'uignets may he operated.

lit 

